Is It Better to Idle in Neutral or Drive

By Ra_Stella242 15 Apr, 2022 Post a Comment

Base Idle is between 350 and 400. When you from park to drive vacuum falls timing sucks in engine dies down.

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What I noticed during this ordeal was that the car had the powerful vibration when in drive but none in neutral.

. You put it back in neutral or park and it goes back to about 850 rpms. All vehicles show a short pulse width at idle regardless of whether theyre sitting in traffic at a red light or coasting downhillat idlein neutral. If I started the car and it had little vibration a.

The higher idle when a car is cold is from the cars computer. In Park or Neutral it idles up at 1500. Does not vibrate in neutral.

Here are the specs. When I shift to drive the engine is. Or get the WhiteLine inserts for the pitch stopper.

Oh I also changed the oil. 1986 Pontiac Fiero. If you put it in drive the rpms start to climb.

Neutral imposes no load while in drive there is a load dropping the engines rpms down. In park or neutral truck idle is at 700 rpm. However there is a time when putting a car in neutral and coasting will return greater fuel efficiencyalthough it.

Its actually a little better when cold. Reason 2-- Carburetor The idle mixture screw should normally be around 1 to 15 turns out and the t-slot maybe 020 exposed up to 040 depends. I am thinking that maybe idling in Neutral is better and I speculate I guess the reason is that in Neutral the engine is disconnected from the transmission in some sense and since youre not moving anyway more engine power can be used to power the accessories such as the air conditioning compressor or the alternator.

Engine runs extremely well otherwise. Joined May 8 2004. Once I drive and then come to a stop the idle is at 900 rpm.

That being said it runs fairly nice I just hate when i go to park and the thing revs way up. The engine has a annoying idle problem that shakesshutters the car when idleing in Drive and stopped like at a stop light. When my car is at a stop light or just sittin there in drive it diesit dies only when the motor is warmit doesnt die right away but the rpms go below 500 and then diesif its in neutral the rpms stay at about 900 and is fine.

If you have people pushing your car with your foot on the brakes they will use more calories than them sitting on the boot swinging their legs. Hard to believe that its an engine problem - the engine idles perfectly if I shift into neutral. After about a 1 hour drive when I shift from neutral to drive I feel a violent jerk as the gears engage.

If the IFR is too large and the idle air bleed too large then you have to restrict the idle mixture screw to get it. If put in neutral it will idle down to 700 rpm put back in drive and it stays at 700 rpm. The shutter goes away when slight accelerator pressure is applied.

The statements expressed above are only for informational purposes and should be independently verified. Engine idles rough in Drive but fine in neutral or par. Up to 8 cash back The injectors may need to be cleaned also to help the engine run smoothly out of gear.

Neutral is slightly better at conserving energy and therefor gas however its barely worth the time shifting in and out of gear at every stop light. The engine tends to go real lean out of gear and can cause the rough idle. This also happens from N to reverse.

And back it off when in neutral. Jump to Latest Follow. Still need to replace some exhaust gaskets especially the donut gasket since it is all swollen and seized.

Postby Twilight Fenrir Sun Jul 31 2011 930 pm. Checked all fluid levels in trans and engine all green. It will use more fuel in drive because it is doing more work even if it is against the brakes modern automatics up the power to keep the idle speed the same.

This is normal but the rough idle is not and dirty injectors can cause it. Actually they use a. It waits for the o2 sensors to heat up before switching itself from closed to open loop.

My idle RPM in Drive is usually 625650 but it will surge up to 725750775 and drop back down. It does not do it all the time. Its worse than the vibration in my 03 Outback with 160k miles.

None of this work impacted the vibration that occurred at idle in D and it is always the same regardless of conditions outside or engine temp. Extended idling isnt great theres much less oil pressure at idle. You would be better to go with an aftermarket.

Im no expert but when in drive there is more load on the engine. This seems like an excessive drop to me. I dont feel any slipping though when driving the car.

Is it better to idle in park or drive. Any load would cause the Elements ECM to raise the engine speed above idle 750 rpm. This shift is even more important when the air conditioner is running so the engine doesnt have to strain so hard while idling.

By definition idle is with the transmission in neutral and no optional loads like AC or lights. The difference between the two idles is the load. Checked the resistance of the IAC it was 101.

Is actually better to immediately drive the vehicle than let it idle to temp. This requiring more brake pressure to get truck stopped and is driving me crazy. Car Idles good in park And neutral.

You should start it give it 30 seconds at idle or so and then drive gently for the first 5-10 minutes. 12 Nov 17 2020. It does the surge in Neutral even when the engine is idling smoother.

After the car is shut off and allowed to sit the problem goes away but comes back after a long drive. Keeping an automatic transmission in Drive puts an extra load on it which drains fuel. Idle while in drive is an oxymoron.

When in drive the engine shutters whether AC is on or off. Ranger suggested that I might have a small vacuum leak and to use Throttle Body cleaner to find it but Im concerned about spraying TB Cleaner on the wrong parts. That is why the rpms drop.

The shakeshutter goes away when put in neutral or park. If there is no idle problem why mess with it. But when I drop it into drive it goes all the way down to around 600.

In neutral its resting or at least as close to rest as an automatic ever gets. Vibration at Idle in Drive but not in neutral. Trans has brand new fluid in it.

The amount of fuel used is minimal to keep the engine at idle rpm but it does result in significantly lower fuel-economy figures while in neutral. I had to set the curb idle high so that when it went into gear it wouldnt stall out.

Tips To Take Care Of Your Car It Is Very Important To Have It In Optimal Conditions